Guitar modded to integrate laptop with music visualizer

Old laptops are a geek modder's best friend: this particular example is one of the better mods we've seen to incorporate an old lappie, with a guy called Ben sticking his old machine behind the strings of an electric guitar. He then linked up the sound produced by the guitar to a visualizer in the laptop, allowing it to pump some psychedelic-looking sound waves out to onlookers. Beats the usual sticker decorations, dontchafink?